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Changes for page WebObjects with Scala

Last modified by Ravi Mendis on 2011/05/10 02:10
From version 496.1
edited by Ravi Mendis
on 2010/12/24 03:05
Change comment: There is no comment for this version
To version 497.1
edited by Ravi Mendis
on 2010/12/24 00:59
Change comment: There is no comment for this version

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1 1  === What is Scala? ===
2 2  
3 -[[Scala>>http://www.scala-lang.org/]] is a modern, multi-paradigm JVM language that is most often compared to [[Groovy>>http://en.wikipedia.org/wiki/Groovy_(programming_language)]], [[Clojure>>http://en.wikipedia.org/wiki/Clojure]] or [[Erlang>>http://en.wikipedia.org/wiki/Erlang_(programming_language)]]. Its [[functional language>>http://en.wikipedia.org/wiki/Functional_programming]] foundations and built-in [[Actors>>http://en.wikipedia.org/wiki/Actor_model]] library make it especially attractive for concurrent computing. (Scala is an abbreviation for "scalable" hinting at its design goals).
3 +[[Scala>>http://www.scala-lang.org/]] is a modern, multi-paradigm JVM language that is most often compared to [[Groovy>>http://en.wikipedia.org/wiki/Groovy_(programming_language)]], [[Clojure>>http://en.wikipedia.org/wiki/Clojure]] or [[Erlang>>http://en.wikipedia.org/wiki/Erlang_(programming_language)]]. Its [[functional language>>http://en.wikipedia.org/wiki/Functional_programming]] foundations and built-in Actors library make it especially attractive for concurrent computing. (Scala is an abbreviation for "scalable" hinting at its design goals). In this day and age of multi-core processors concurrent computing can not be ignored.
4 4  
5 -In this day and age of multi-core processors concurrent computing can not be ignored. Many of the design features of Scala have been chosen with concurrency in mind, some of which may not be unfamiliar to Objective-C or WebObjects developers. Here's a summary:
5 +Many of the design features of Scala have been chosen with concurrency in mind, some of which may not be unfamiliar to Objective-C or WebObjects developers. Here's a summary:
6 6  
7 7  |= |= Objective-C |= Java |= Scala
8 -|= Immutability | Partial - via collections //e.g: NSArray/NSMutableArray// | No | Yes
8 +|= Immutability | Partial - via Collections //e.g: NSArray/NSMutableArray// | No | Yes
9 9  |= Closures | Yes - via Blocks (//Extension//) | No | Yes - via Anonymous Functions
10 10  |= Static variables | Yes | Yes | No
11 -|= Static methods | Yes | Yes | No
11 +|= Static methods or functions | Yes | Yes | No
12 12  |= Concurrency | Yes - via [[Grand Central Dispatch>>http://en.wikipedia.org/wiki/Grand_Central_Dispatch]] (//Extension//) | //Yes - via Threads// | Yes - via [[Actors>>http://en.wikipedia.org/wiki/Actor_model]]
13 13  |= |= Weakly Typed |= --Strongly Typed-- |= Strongly Typed
14 14  
... ... @@ -16,7 +16,7 @@
16 16  
17 17  |= |= Objective-C |= Java |= Scala
18 18  |= Parametered methods | Yes //e.g: addObject: to~:// | No | Yes //e.g: add(object= ,to=)//
19 -|= Class composition | Yes - via Categories | Yes - via Interfaces | Yes - via [[Traits>>http://en.wikipedia.org/wiki/Trait_(computer_science)]]
19 +|= Class composition | Categories | Interfaces | Traits
20 20  
21 21  === Why Use Scala? ===
22 22  
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162 162  
163 163  ==== Scala Annotations vs. Generated Accessors ====
164 164  
165 -Here's an example of accessing variables in the following languages:
165 +An example of accessing variables in WebObjects with the following languages:
166 166  
167 167  |= |= Objective-C |= Java |= Scala
168 168  |= getter | ##object name## | ##object.name()## | ##object.name##